Today a friend brought in his 40/3.5 Tessar camera looking for a filter which would also mount a lens hood (male/female threads).
The 24mm filter he had did not have a front thread, so it was filter OR lens hood, but not both at the same time.
This got me wondering about what filter size for each lens option.
I had remembered a 30.5 mm dia. for some lenses, but I cannot confirm that in my checking.
And, is there a filter made in the various sizes which will also permit a lens hood to be screwed on at the same time?
It has been quite a while since I had a Rollei 35, so I am hazy on these details.
Thanks in advance for sharing your knowledge.